I'm not kidding, it's really easy. Open the program and click the Auto Config button.

Now make sure your router can forward the ports. This is what my Apple Time Capsule looks like. You need to open UDP ports 500, 1701, and 4500. If you want you can open TCP 1723 but it isn't necessary. It is for PPTP access which isn't as secure as L2TP. Make sure the Private IP Address points to the Internal Network address of the computer the VPN server is installed on. You can get that from the Network settings.

Here's what it looks like on another router (Linksys with Tomato Firmware). Note: These are on two different networks hence the different internal IP ranges.

Now you can set up a client to connect to it.

Here it is from an iPad. What you need is:

1. User name. Your user name is User1, or User2 or User3, etc.

2. Password. Click the show password block and input your admin password. Your password will then be visible.

3. Shared Secret. Same thing. Click the button, input password and then you can see your Shared Secret.

Now input your VPN credentials into your iPad. Go to the VPN settings

Now input your server. I have my own domain so I added it. (This could also be the IP address shown on the very first screenshot on this page, the one I have mostly blacked out).

Add your account name (it will be User1, User2, etc.) (this is actually a screenshot of another VPN server but it is the same procedure).

Now connect.

That's it. Make sure you turn it on though before trying to connect. It's the button on the upper left corner.